<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>内边距对行元素的效果</title>
		<style>
			div{
				margin-top: 40px;
				border: 1px solid blue;
				overflow: hidden;
			}
			span{
				border: 1px solid red;
				padding: 20px;
			}
		</style>
	</head>
	<body>
		<div id="d1">
			<span>We change lives!</span>
		</div>
	</body>
</html>